JP2012086389A - Method and apparatus for manufacturing tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a tire using a tread joint pressure bonding method of a low cover usable online capable of obtaining stable quality and excellent in work efficiency.SOLUTION: There are provided the tire manufacturing method having a feed-in process for feeding the low cover which is sent in a horizontally placed state from the feed conveyor of a manufacturing line into a pressure bonding area, a centering process for performing the centering of the low cover, a joint detection process for detecting the joint of the tread of the low cover by rotating the low cover subjected to centering by a rotary means, a joint positioning process for fixing the joint at a predetermined position to perform the positioning of the joint, and a pressure bonding process for pressing the joint at the predetermined position by a pressure roller to bond the joint under pressure. A tire manufacturing apparatus using the manufacturing method is also disclosed.

Description

  The present invention relates to a tire manufacturing method and manufacturing apparatus, and more particularly, to a tire manufacturing method and manufacturing apparatus for crimping a tread joint on a manufacturing line (online).

  In manufacturing a tire, there is a step of crimping both ends of a constituent material of a raw tire (low cover). As for the constituent materials other than the tread among the constituent materials of the raw cover, various crimping devices and crimping methods for crimping and joining both ends of the constituent materials have been developed (for example, see Patent Document 1). In addition, a crimping apparatus and a crimping method for crimping a joint portion of a temporarily pressed tire sidewall have been developed. In this crimping apparatus and crimping method, a sidewall is attached to a cylindrical drum, and both ends of the sidewall are crimped by a consolidating roller.

  On the other hand, with regard to tread joints, it is difficult to ensure the quality of the joint because the thickness of the tread is thicker than other molding materials and the profile is attached, and various methods are adopted depending on the nature of the tread. .

  However, an appropriate crimping device has not been developed because it is difficult to stably detect the joint portion. For this reason, these operations are performed manually by an operator offline using, for example, a tread holding consolidator.

JP 2007-83676 A

  However, when jointing by crimping both ends of the tread of the low cover, it is necessary to apply a large pressing force to the joint part. Therefore, in the case of the method of jointing manually, the work load is large and the joint part can be held down. There is a risk of accidents such as slipping at hand. In addition, since the pressed state is not stable, stable quality cannot be obtained, and work takes time, which is not efficient.

  For this reason, this invention makes it a subject to provide the manufacturing method and manufacturing apparatus of a tire using the tread joint crimping | compression-bonding method of the low cover which can be used on-line, can obtain the stable quality, and is excellent in working efficiency. .

To solve the above problem,
The tire manufacturing method according to the present invention includes:
A carrying-in process for carrying the raw cover sent in a horizontal position from the conveyor of the production line into the crimping area;
A centering step for centering the raw cover;
A joint detecting step of detecting the joint portion of the tread of the raw cover by rotating the centered raw cover by a rotating means;
A joint part positioning step for positioning by fixing the joint part at a predetermined position;
A crimping step of pressing and pressing the joint portion with a presser roller at the predetermined position.

The tire manufacturing apparatus according to the present invention includes:
A tire manufacturing apparatus used in the tire manufacturing method,
Carrying-in means for carrying the raw cover sent in a horizontal state from the conveyor on the production line into the crimping area;
Centering means for centering the low-cover in the horizontal position;
Rotating means for rotating the centered raw cover;
Joint detection means for detecting a joint portion of the tread of the raw cover;
It has a pressing roller, and is provided with a pressure-bonding means for pressing and pressing the joint portion with the pressing roller at a predetermined position.

In addition, the tire manufacturing apparatus includes:
The determination means has a mark detection sensor for detecting a mark attached to the raw cover as detection means for detecting the joint portion.

In addition, the tire manufacturing apparatus includes:
The rotating means has two transport roller conveyors divided into two at the center,
The raw cover is configured to rotate by rotating one of the conveying roller conveyors in the normal direction and rotating the other in the reverse direction.

In addition, the tire manufacturing apparatus includes:
The rotating means has a vertical drive roller that rotates inscribed in the raw cover,
The raw cover is configured to rotate by rotation of the vertical drive roller.

In addition, the tire manufacturing apparatus includes:
The pressure-bonding means includes two pressing rollers, a motor, and an air cylinder;
The two pressing rollers sandwich the joint part from the inside and the outside,
The motor presses the joint portion with a predetermined pressure via the two pressing rollers,
The air cylinder is configured to move the two pressing rollers pressing the joint portion in the vertical direction along the joint portion.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method and manufacturing apparatus of a tire using the tread joint crimping | compression-bonding method of the low cover which can be used on-line, can obtain the stable quality, and are excellent in working efficiency can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the outline | summary of the tread joint crimping | compression-bonding apparatus of the 1st Embodiment of this invention, (a) (b) is a top view and a side view, respectively. It is a flowchart of the tread joint crimping | compression-bonding process of the 1st Embodiment of this invention. It is a figure explaining the tread joint crimping | compression-bonding process of the 1st Embodiment of this invention. It is a figure explaining the tread joint crimping | compression-bonding process of the 1st Embodiment of this invention. It is a figure explaining the tread joint crimping | compression-bonding process of the 1st Embodiment of this invention. It is a figure explaining the tread joint crimping | compression-bonding process of the 1st Embodiment of this invention. It is a top view which shows the outline | summary of the tread joint crimping | compression-bonding apparatus of the 2nd Embodiment of this invention. It is a side view explaining the detection operation of the joint part in the 2nd Embodiment of this invention.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

(First embodiment)
In the first embodiment, one of the conveyance rollers divided into left and right at the center is rotated forward, and the other is reversed to rotate the raw cover carried into the tread joint crimping area to position the joint portion of the tread. The tread joint crimping device configured as described above and a tread joint crimping method using the same.
1. Tread Joint Crimping Device The tread joint crimping device of the present embodiment is arranged in the tire manufacturing line (online) and is a tread joint crimping for crimping the joint part of the jointed low cover tread before the paint machine. Device.

  Fig.1 (a) (b) is the top view and side view of a tread joint crimping | compression-bonding apparatus of this Embodiment. In the drawing, two types of raw covers 1 and 1A are shown on the same drawing.

  The tread joint crimping device detects carry-in means for carrying the raw cover into the crimping area, centering means for positioning the carried raw cover at the center of the crimping area, rotating means for rotating the raw cover, and the joint part. Joint part positioning means for stopping rotation when the joint part comes to a predetermined position, crimping means for crimping the joint part, and control means (not shown) for controlling the operation of each means are provided.

(1) Carry-in means The carry-in means is provided with a transport conveyor 21 provided on the upstream side, and transport rollers 14 and 15 that are divided into left and right at the center with respect to the traveling direction of the raw covers 1 and 1A. A gap Q is provided between the transport rollers 14 and 15. The conveying rollers 14 and 15 are also constituent members of centering means, rotating means, and joint portion positioning means described later.

  Further, the transport rollers 14 and 15 are connected to the transport roller drive motors 23 and 24 via a transmission mechanism (not shown), and can be rotated forward and backward as indicated by white arrows in FIG. It has become.

(2) Centering means The centering means is provided with a centering roller (vertical free roller) 17, a guide post 18 and a centering position detection sensor (not shown). The centering roller 17 and the guide post 18 are provided with a centering roller lifting cylinder 26 and a guide post lifting cylinder (not shown), respectively. It is configured to be able to rise above 14 and 15 and to descend below. Further, a centering roller transfer cylinder 32 for moving the raised centering roller 17 in the lateral direction along the gap Q is provided.

(3) Rotating means In the present embodiment, the centered raw cover is rotated by rotating one of the transport rollers 14 and 15 forward and rotating the other reverse.

(4) Joint part positioning means The joint part positioning means includes a transport roller stop device (not shown) for stopping driving of the transport rollers 14 and 15 based on the detection signal of the joint sensor 16, and after the joint part is positioned. Further, as shown by the downward arrow in FIG. 1B, a product presser 31 is provided for pressing and fixing the raw cover during the tread joint crimping from above.

(5) Crimping means In the crimping means, the pressing rollers 12 and 13 for pressing the joint portion with a predetermined pressure, and the pressing roller 13 are moved toward the left side of the drawing as shown by the left-pointing arrow in FIG. And a pressing roller that vertically moves the motor 34, the pressing rollers 12, 13 and the motor 34, which are suitable for pressing the joint portion with a predetermined pressure, above and below the conveying rollers 14, 15 through the gap Q. A lifting cylinder 27 is provided. In addition, 11 is a free roller for carrying out the raw cover after joint part crimping | compression-bonding.

2. Next, a tread joint crimping method using the tread joint crimping apparatus will be described. FIG. 2 is a flowchart of the tread joint pressing method according to the present embodiment. 3-6 is a figure explaining each process of the crimping | compression-bonding method of the tread joint of this Embodiment. Hereinafter, description will be made with reference to FIGS. 3 to 6 in the order of the steps shown in FIG.

(1) Forward rotation of transport roller (loading of raw cover)
After lowering the pressing rollers 12 and 13 and unloading the preceding low cover from the pressure-bonding area, the low cover 1 and 1A sent in the horizontal state by the transfer conveyor 21 immediately after the removal of the low cover 1 and 1A is transferred to the transfer roller 15 ( 14) is rotated forward and carried into the crimping area (FIG. 3A).

(2) Centering position detection (confirmation)
Next, when the tread joint is detected by rotating the low cover while rotating one of the left and right transport rollers 14 and 15 on which the low cover is straddled and rotating the other transport roller in reverse. Then, the raw cover is stopped (FIG. 3B).

(3) Raising the presser roller Next, the presser roller raising / lowering cylinder 27 is driven to raise the presser roller 12 along the inside of the raw cover, and the presser roller 13 and the motor 34 are raised along the outer side of the raw cover to press the presser roller. The rollers 12 and 13 are positioned near the upper edge of the raw cover (FIG. 3C).

(4) Centering roller lift and guide post lift Next, the centering roller lift cylinder 26 is operated to lift the centering roller 17 to the upper edge of the raw cover 1 (FIGS. 3D to 3F).

  At the same time, the guide post raising / lowering cylinder is operated to raise the guide post 18 to the upper edge of the raw cover 1, and the upper limit of the guide post 18 is confirmed by a sensor (not shown).

(5) Centering roller transition (centering)
Next, the centering roller 17 is moved leftward in the figure by the centering roller transfer cylinder 32, and the centering roller 17 and the pressing roller 12 are inscribed in the low cover 1, 1A, thereby centering the low cover ( FIG. 4 (a)).

(6) Joint sensor extension Next, the cylinder 25 is driven to extend the joint sensor 16 that has been withdrawn from the conveying rollers 14 and 15 to the vicinity of the tread joint pressing position (FIG. 4B).

(7) Carrying roller one-side reversal and joint NG portion detection Next, one of the transporting rollers 14 and 15 is rotated forward and the other is rotated reversely to rotate the raw cover 1 and 1A. Since the positions of the low covers 1 and 1A are fixed by the inscribed centering roller 17 and the pressing roller 12, they can be rotated at the same position. While rotating the low cover 1, 1A, the joint sensor 16 detects that the joint portion has reached the crimping position, and stops the low cover 1, 1A. (FIGS. 4C and 4D).

(8) Transport roller stop (confirmation) and joint sensor return Next, simultaneously with the detection by the joint sensor 16, the transport rollers 14 and 15 are stopped to stop the rotation of the raw cover. Further, the cylinder 25 is driven to retract the joint sensor 16 to the side of the conveying roller 14 (FIGS. 4D to 4F).

(9) Product presser lowering Next, the product presser 31 is lowered by a drive cylinder (not shown), and the raw cover 1, 1A is pressed from above (FIG. 5A).

(10) Pressing roller pressing Next, the outer pressing roller 13 is moved horizontally in the direction approaching the inner pressing roller 12 (direction indicated by the white arrow) by driving the motor 34, so that the outer side of the low cover 1, 1 </ b> A is removed. The side surface (tread surface) is pressed with a predetermined pressure (FIG. 5B).

(11) Lowering the pressing roller Next, while pressing the pressing roller 13 against the surface of the tread, the pressing rollers 12 and 13 are moved down along the joint portion by driving the pressing roller lifting / lowering cylinder 27, thereby moving the joint portion. Crimping is performed (FIG. 5C).

(12) Pressing roller return Next, the pressing roller 13 is moved horizontally in the direction away from the pressing roller 12 to return to the original position (FIG. 5D).

(13) Returning and lowering of the centering roller Next, the centering roller 17 is moved and lowered by the centering roller transfer cylinder 32 and the centering roller lifting cylinder 26 to return to the original standby position below the transport roller (see FIG. 5 (e) (f)).

(14) Guide Post Lowering and Confirmation Next, the guide post is lowered by the guide post elevating cylinder 28 and returned to the standby position below the conveying roller. A sensor (not shown) confirms that the guide post 18 is at the lower limit (FIGS. 6A and 6B).

(15) Product presser rise, product presser lift start and timer start Next, the product presser 31 is raised and the raw cover 1 is released. Further, the timer is started simultaneously with the start of raising the product presser (FIGS. 6C and 6D). The rise of the product presser 31 is confirmed by a cylinder sensor (not shown).

(16) Forward rotation of transport roller (carrying out)
Next, after a predetermined time has elapsed from the start of the rise of the product presser by the timer, and the rise of the product presser 31 is confirmed by the cylinder sensor, the transport roller 15 (14) is rotated forward, and the low cover 1 (1A) is crimped. Unload from the area (FIG. 6E).

3. Effects of the present embodiment According to the present embodiment,
(1) Since the portion marked on the joint is detected by the joint sensor while rotating the raw cover, the joint portion can be detected stably. For this reason, online work becomes possible. As a result, the work load can be reduced and the risk of accidents occurring can be eliminated.
(2) Since the joint portion is pressure-bonded under a certain condition with respect to pressure or the like, not by manual work but by controlling the machine and electricity, the quality of the joint can be stabilized and defects can be reduced.
(3) By placing the joint crimping process on-line before the paint machine, the cycle of the molding operation is shortened, so the productivity is improved.
(4) Since the crimping device is provided in the space below the conveying roller, it is possible to crimp the tread joint online without adding a space to the paint line.

(Second Embodiment)
The second embodiment is different from the first embodiment in the means for rotating the raw cover carried in the tread crimping area and the detection means for detecting the joint portion. Hereinafter, this difference will be described with reference to FIGS.

1. Raw Cover Rotating Means First, means for rotating the raw cover will be described. FIG. 7 is a plan view showing an outline of the tread joint crimping apparatus of the present embodiment. In FIG. 7, 1 is a low cover, 11 is a free roller, 13 is a pressure roller, 14 and 15 are conveyance rollers, 16a is a mark detection sensor, and 17a is a drive roller for rotating the low cover (vertical). 18 is a guide post, 21 is a transport conveyor, 22 is a motor, and S is an arrow indicating that the low cover rotation driving roller 17a moves in both directions.

  In the present embodiment, the transport rollers 14 and 15 are configured to perform normal rotation or reverse rotation by a motor. The pair of left and right guide posts are vertical free rollers.

  After the low cover rotating drive roller 17a and the pair of left and right guide posts 18 are raised and inserted into the cylindrical raw cover 1, the raw cover rotating drive roller 17a is moved in the left direction in the figure to be inscribed in the raw cover 1. At the same time, the raw cover 1 is spread with tension. Then, the transport roller 14 is rotated forward, the transport roller 15 is rotated reversely, and the raw cover 1 is rotated.

  The mark detection sensor 16a is provided so as to detect the sensor output, that is, the vicinity where the tension is applied to the raw cover at the time of detection (outside of one guide post 18). In addition, by providing a pair of left and right guide posts 18, the free roller 11 a and the pressing roller 13 positioned at the center between the guide posts 18 are pressed and pressure bonded.

2. Next, the detection means for detecting the joint portion will be described. FIG. 8 is a side view for explaining the joint portion detection operation of the present embodiment. In FIG. 8, 1 is a raw cover, 2 is a tread surface, 3 is a joint part, 4 is a mark, 5a and 5b are color lines.

  In the present embodiment, the joint portion 3 is detected using the mark 4 attached in the previous process. That is, a color detection sensor is used as the mark detection sensor 16a, and the joint portion 3 is detected by detecting the mark 4 attached in the previous process.

3. Effects of the present embodiment According to the present embodiment,
(1) Since the tension is applied to the raw cover from the inside, the distance between the joint portion and the sensor is stabilized. For this reason, a joint part can be positioned more accurately.
(2) Since the joint portion 3 is detected using the mark 4 attached in the previous step, the joint portion can be detected with higher sensitivity without adding a step.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the above-described embodiment.

DESCRIPTION OF SYMBOLS 1, 1A Raw cover 2 Tread surface 3 Joint part 4 Mark 5a, 5b Color line 11, 11a Free roller 12, 13 Pressing roller 14, 15 Conveyance roller 16 Joint sensor 16a Mark detection sensor 17 Centering roller 17a Low cover rotation drive roller 18 Guide Post 20 Tread joint crimping device 21 Conveyor 22, 34 Motor 23, 24 Transport roller drive motor 25 Cylinder 26 Centering roller lifting cylinder 27 Pressing roller lifting cylinder 31 Product pressing 32 Centering roller transition cylinder Q Clearance

Claims (6)

A carrying-in process for carrying the raw cover sent in a horizontal position from the conveyor of the production line into the crimping area;
A centering step for centering the raw cover;
A joint detecting step of detecting the joint portion of the tread of the raw cover by rotating the centered raw cover by a rotating means;
A joint part positioning step for positioning by fixing the joint part at a predetermined position;
A tire manufacturing method comprising: a pressing step of pressing the joint portion with a pressing roller at the predetermined position and pressing the joint portion. A tire manufacturing apparatus used in the tire manufacturing method according to claim 1,
Carrying-in means for carrying the raw cover sent in a horizontal state from the conveyor on the production line into the crimping area;
Centering means for centering the low-cover in the horizontal position;
Rotating means for rotating the centered raw cover;
Joint detection means for detecting a joint portion of the tread of the raw cover;
A tire manufacturing apparatus comprising: a pressing roller; and a pressing unit that presses and presses the joint portion with the pressing roller at a predetermined position.   The tire manufacturing apparatus according to claim 2, wherein the determination unit includes a mark detection sensor that detects a mark attached to the raw cover as a detection unit that detects the joint portion. The rotating means has two transport roller conveyors divided into two at the center,
4. The tire manufacturing apparatus according to claim 2, wherein the raw cover is rotated by rotating one of the conveying roller conveyors in the normal direction and rotating the other in the reverse direction. 5. The rotating means has a vertical drive roller that rotates inscribed in the raw cover,
The tire manufacturing apparatus according to claim 2 or 3, wherein the raw cover is rotated by rotation of the vertical drive roller. The pressure-bonding means includes two pressing rollers, a motor, and an air cylinder;
The two pressing rollers sandwich the joint part from the inside and the outside,
The motor presses the joint portion with a predetermined pressure via the two pressing rollers,
The said air cylinder is comprised so that the said 2 pressing roller which is pressing the said joint part may be moved to an up-down direction along the said joint part, The Claims 2 thru | or 5 characterized by the above-mentioned. The tire manufacturing apparatus of any one of Claims.

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